Early Cretaceous Dinosaurs from the Sahara

摘要: A major question in Mesozoic biogeography is how the land-based dinosaurian radiation responded to fragmentation of Pangaea. rich fossil record has been uncovered on northern continents that spans Cretaceous, when continental isolation reached its peak. In contrast, dinosaur remains southern are scarce. The discovery skeletons from Lower Cretaceous beds Sahara shows several lineages tetanuran theropods and broad-toothed sauropods had a cosmopolitan distribution across Pangaea before onset fragmentation. distinct faunas Africa, South America, Asiamerica arose during by differential survival once widespread land masses were becoming increasingly isolated one another.